Could Mariah be the perfect name for your baby girl? The baby girl name Mariah is 6 letters long, and contains 3 vowel(s) and 3 consonant(s). Mariah is a baby girl name that starts with the letter M and ends in the letter H. The baby girl name Mariah has a popularity of 70% and is ranked 305 in the list of top 1000 most popular baby girl names. If Mariah isn't the ideal name for your baby girl then take a look here for some randomly generated names. Hopefully you'll find a more suitable first name for your baby girl than Mariah!